I would consider myself a peel and stick expert. I sand and wash my walls to ensure evenness, and I am fast at installation. This is by far the worse peel and stick paper I've ever used. I am almost finished with the job, but after 6 hours on a really small space, I should have just returned the second roll and tried something different. I also considered setting myself on fire, but figured it would be too much paperwork for my family.
1) This far into the peel and stick game, there is ZERO reason not to have grid lines on the back paper.
2) Aside from the grid line helping to measure, this paper frequently sticks too firmly to the backing, making it hard to remove or tear, requiring you to pick at it, making creases in the wallpaper. It takes even longer to fix because you can't really see the edges well. If the gridlines were there, any remaining backing would be obvious.
3) If you breath near this paper, it folds and sticks on itself. I've never encountered a paper that does this with such frequency. Just the process of lifting the paper to start applying it results in a crumpled mess by the time it hits the wall.
4) The pattern is large; between two rolls, half ended up as wasted short ends because I would frequently need to trim more than a foot off each piece to attempt to line up the pattern.
5) Not once ever in 6 hours (so far) working with this paper did the pattern line up fully. If you get a few inches to line up, frequently the next section is baggy. This is the only peel and stick wallpaper I've used where I've had to purposefully ADD creases in order to line up an edge. Unfortunately in flattening out these crease introduces lines into the paper. It looks unprofessional, but luckily I'm using this paper in a closet, so people won't look too closely.
6) The roll is cut exactly to the repeating edge of the pattern. This means you can't include the 1/8" overlap recommended with Peel and Stick because it often shrinks slightly once applied.
7) Because of poor line up, no overlap space, and the paper sticking to itself, each panel will need to be adjusted approximately 40 times before you are able to move on, sadly, to the next panel.
8) The ink bleeds slightly, which means when you try to get out air bubbles, blue smudges get on your wall
I'm giving this two stars because: the overall pattern looks nice, so long as you don't look closely. Though the paper falls in on itself so easily, it takes a lot to tear, and simple folds don't create hard creases or lines in the wallpaper. It can be adjusted a million times and still seems to stay up—which is good because you will need to adjust it every single one of those million times.